Thanks I seen it with METAL C using far pointers The only reason I can imagine the use of class is for using the Q con to get an offset As I think Q con only supports DSECT DXD or sections in class names
Thanks > On Nov 22, 2020, at 12:04 PM, Jonathan Scott <jonathan_sc...@vnet.ibm.com> > wrote: > > Ref: Your note of Sun, 22 Nov 2020 11:35:41 -0500 > > Joe Reichman <reichman...@gmail.com> writes: >> Asking a few questions to see I understand the usage of CATTR >> ... > > CATTR is managed in the same way as other location counters such > as CSECT and LOCTR. > > With GOFF, each new CSECT statement starts an element whose > class name will be filled in later as B_TEXT and whose section > name is the same as the CSECT name. It also generates a symbol > definition associating the CSECT name as an external name with > the start of the element. Coding CATTR starts a new element > whose class name is given by the name field and which also > belongs the current section (given by the current CSECT name). > Do not attempt to specify class name B_TEXT explicitly for any > purpose as this is not supported by HLASM and will probably > cause errors at bind time. > > You can resume any existing location counter in the usual way > (for example by a CSECT or LOCTR statement with the original > name) to switch away from that element, and you can use CATTR > again with the same name to resume the element. > > Uses for CATTR are rare, as it is primarily used to support > compatibility with classes generated by compilers for special > purposes. I certainly wouldn't recommend it in this case. > > All normal (sequential) I/O processing can be performed in > 31-bit mode nowadays. The only aspect which requires 24-bit > storage is the DCB. Since the DCB should be in dynamic storage > rather than part of the program, that means you should acquire > the relevant storage with LOC=BELOW. Exit addresses such as > EODAD= should be specified via a DCBE to support 31-bit mode. > > If you really need separate loadable sections in 24-bit and > 31-bit storage, just use a separate CSECT and specify the binder > option RMODE(SPLIT). > > Jonathan Scott, HLASM > IBM Hursley, UK
